Container emptying means for refuse trucks



July 13, 1954 H. LINDE CONTAINER EMPTYING MEANS FOR REFUSE TRUCKS 3 Sheets-Sheet 1 Filed Sept. 26, 1950 July 13, 1954 H. LINDE CONTAINER EMPTYING MEANS FOR REFUSE TRUCKS 3 Sheets-Sheet 2 Filed Sept. 26, 1950 July 13, 1954 LlNDE CONTAINER EMPTYING MEANS FOR REFUSE TRUCKS 3 Sheets-Sheet 5 Filed Sept. 26, 1950 Patented July 13, 1954 UNITED STATES CONTAINER EMPTYING MEANS FOR REFUSE TRUCKS Hilding Linde, Kalmar, Sweden Application September 26, 1950, Serial No. 186,852

Claims priority, application Sweden September 26, 1949 Claims.

This invention relates to a device for dustfree emptying of dustbins into a refuse collecting container, which device comprises an emptying plate pivoted at its lower end and provided with an opening corresponding with the mouth of the dustbin. It is often desired to mount such an emptying device as high as possible whereby a sufficient loading of the container and a better distribution of the load within the container is attained. In case the dustbin is to be coupled with the emptying device by hand, however, it is difiicult to lift the bin over a certain height, corresponding to about 5 feet from the ground to the coupling member on the emptying plate.

One object of the invention is to increase the height for manually operating of the dustbins without the use of elevators and similar mechanical means.

Another object of the invention is to provide a simple emptying device which is effective in use a and cheap to manufacture.

With this and other objects in view the inven-- tion will be hereinafter described and illustrated by way of example in the accompanying drawing in which:

Figure 1 is a side elevation, partly in section, of the emptying device with a dustbin coupled to a bin carrier in a somewhat elevated position; Figure 2 is an end view corresponding to Figure l but with the dustbin removed and the bin carrier in its lowest position; and Figure 3 is a side view, on reduced scale, of a truck body showing a dust bin in emptying position in dash-dot lines.

In the drawings l is the end of a refuse collecting container provided on the top thereof with an emptying hood 2 for dustfree emptying of the bin. This emptying hood comprises an emptying plate 3, which has an opening corresponding to the mouth of the dustbin and which is pivoted at its lower edge on a shaft 3. At the top edge the emptying plate is hingedly connected by means of two bolts 5 with a cover plate 6, which in a known manner is swung inwards and upwards by means of pivoted arms- 33 when the emptying plate 3 is swung inwards.

On the emptying plate two downwardly extending arms i are fastened, and a shaft 9 extending between said arms is carried by bearings 3. The arms 7 and the shaft 9 form a supporting device for a bin carrier it for connection with the dustbin. This carrier comprises a U-shaped frame with upwardly directed shanks fastened to the shaft 9, and along the shanks two substantially triangular plates H are welded. The outstanding angles or corners of these plates are connected by a bolt I2 forming a coupling member for the dustbin I8, which is provided with a corresponding coupling hook It. It is apparent that the coupling bolt I2 is located a substantial distance in rear of the pivot shaft 9 when the carrier is in its lowest position. The bottom ring it of the bin rests against an abutment [6 on a plate ll extending between the lower ends of the shanks. The dustbin is maintained in this position by means of a hook l8 pivoted on a shaft [9 and pressed against the bottom ring from below by a spring located on the opposite side of plate i! from the bin. A rod 2i extending between the triangular plates El passes through a slot in a locking arm 22 adapted to lock the coupling members I2, Hi during the emptying operation. The locking arm 22 is at 23 oonnected with the one arm 2t of a bell crank lever pivoted on a shaft 26, and the other arm 25, which is provided with a roller, rests against a cam 27 which is fixed to the arm system I. The roller is pressed against the cam by means of a spring 28.

In the position shown in Figure 1 with the bin carrier somewhat raised from its substantially vertical end position the locking arm 22 has been adjusted to the locking position, in which the locking arm rests against the coupling hook Hi and prevents disconnection of the bin from the bolt l2. If the bin is raised further to the horizontal position l3a and the emptying position [31) in Fig. 3, the locking arm maintains its position. If the carrier is lowered to its end position l3, Fig. 3, however, the arm slides on the cam 21 and thereby moves the locking arm back on the rod 2! against the action of the spring 23 so as to allow the bin to be removed from the bolt l2.

Owing to the considerable turning radius of the coupling bow 29 on the cover 36 of the bin a reliable coupling of the bow 29 with a coupling hook fastened to the cover plate cannot be obtained in the usual way. According to the invention a coupling hook 3! is, therefore, fastened to a rotatable shaft 32 carried by two bearings 33 mounted on the back side of the cover plate. The shaft 32 extends beyond a flange $4 of the cover plate 5 and has a rocking arm 35 provided on its free end. This rocking lever coacts with a limit stop 36 on the inside of the cover plate in such a manner that the hook 3i is turned downwards, when the arm 35 strikes the stop 36. The arm 35 is further connected with a spring 31, by which the hook 3! is resiliently turned upwards, when the arm 35 is released from the limit stop 36 at the movement inwards of the cover plate.

The operation of the device is as follows. The bin 13 is to be placed with the hooks Hi on the coupling bolt 12, whereafter the bottom ring 15 by means of the gravity of the bin engages the hook it and thereby is automatically locked. As

the bin carrier hereafter is turned from its vertical position to the position shown in Figure l, a locking arm 28 prevents disconnection of the bin during the emptying operation. When the mouth of the bin is introduced into the opening in the emptying plate and the bin thereafter is swung inwards to be emptied, the emptying plate 3 turns around the shaft 4 and the cover plate 6 around the shaft 5 to the effect that the rocking lever 35 is released from the limit stop 38 and the coupling hook 3| by means of the spring 37 is turned upwards and engages the coupling bow 29 on the cover of the bin, whereby the cover plate 6 opens the cover 30. On the return movement the coupling bow 29 is automatically released from the coupling hook 3|, and when the hook ill by means of a foot pedal or the like is turned downwards, the emptied bin can be removed.

By the device as shown the advantage is obtained that the dustbin including its upper coupling member may be raised in a simple manner to a higher emptying position compared with. the case that the coupling bolt 12 had been provided directly on the emptying plate.

I claim:

1. In a device for dustfree emptying of dust bins into a refuse collecting container, an emptying plate having an opening corresponding to the mouth of the dust bin and being pivoted at its lower end, a downward extending suspension device fastened on said emptying piate, and a bin carrier pivoted in said suspension device at a level below the emptying plate so as to hang freely downwards above the ground and provided with a coupling device located at a distance in front of the pivot axis of the'bin carrier by connecting the bin and raising the coupling device during the turning motion of the bin carrier and an automatic locking mechanism for said coupling device comprising a locking arm operated by a rocking lever cooperating with a cam fixed on said suspension device, said bin carrier, thus supporting solely the dust bin, being further adapted to be swung upwards together with the bin and thereby to guide the mouth of the bin into the opening of the emptying plate.

2. In a device for dustfree emptying of dust bins into a refuse collecting container, an emptying plate having an opening corresponding to the mouth of the dust bin and being pivoted at its lower end, a downwards extending suspension device fastened on said emptying plate, and a bin carrier pivoted in said suspension device at a level below the emptying plate so as to hang freely downwards above the ground and provided with a coupling device located at a distance in front of the pivot axis of the bin carrier for connecting the bin and raising the coupling de vice during the turning motion of the bin carrier and an automatic locking mechanism for said coupling device comprising a locking arm, a guide rod fixed to the bin carrier and passing through a slot in said locking arm, a bell crank connected with said locking arm, a cam fixed to said suspension device, and a spring pressing said bell crank towards said cam.

3. In a device for dustfree emptying of dust bins into a refuse collecting container, an emptying plate having an opening corresponding to the mouth of the dust bin and being pivoted at its lower end, a downwards extending suspension device fastened on said emptying plate, a bin carrier pivoted in said suspension device at a level below the emptying plate and provided with a coupling device for connecting the bin carrier with the bin, said bin carrier being adapted to be swung upwards together with the bin and thereby to guide the mouth of the bin into the opening of the emptying plate, a cover plate hingedly connected with said emptying plate at their upper edges, and a coupling hook on said cover plate for engaging a corresponding coupling member on the cover of the dustbin, said coupling hook being fixed to a shaft having an arm for turning said shaft when striking against said emptying plate.

4. In a device for dustfree emptying of a dustbin into a refuse collecting container, an emptying plate having an opening for the mouth of the dust bin and being pivoted at its lower end to the container, two laterally spaced arms fixedly connected with said emptying plate and depending from said emptying plate to a level well below the pivotal axis of the emptying plate, bin carrier frame pivoted at its upper end in said arms at a level well below the pivotal axis of the emptying plate, projections extending transversely and rearwardly of the pivotal of said bin carrier frame, and a coupling device for engaging a corresponding coupling member on the upper portion of the dustbin and mounted upon said projections at a substantial horizontal distance rearwardly of said second pivotal axis and at a level well below the pivotal axis of the emptying plate, for swinging and raising the portion of the mouth of the coupled dust bin located nearest to the pivot of the emptying plate, when the bin carrier with the bin is swung from its lowest to an upper position.

5. In a device for dustfree emptying of a dustbin into a refuse collecting container, emptying plate having an opening for the mouth of the dustbin and being pivoted at its lower end to the container, two laterally spaced arms fixedly connected with said emptying plate depending from said emptying plate to a level well below the pivotal axis of the emptying plate, a bin carrier frame in the form of a U having the ends of its shanks pivoted in said arm a a level well below the pivotal axis of the ing plate, two substantially triangular plates each fastened with one edge along one of said shanks and projecting transversely and rear wardly of the pivotal axis of said bin carrier frame, and a rod extending between the projecting corners of said triangular plates at a substantial horizontal distance rearwardiy of said pivotal axis of said carrier frame and at a level well below the pivot of the emptying plate, for engaging a coupling member on the upper pcrtion of the dustbin and swinging and raising the portion of the mouth of the coupled dustbin located nearest to the pivot of the emptying plate, when the bin carrier with the bin is swung from its lowest to an upper position.

References Cited in the file of this patent UNITED STATES PATENTS 

